NASA NTRS · 19930000457
Two-Band Pyrometers Detect Hydrogen Fires
Abstract
Two-band infrared pyrometers detect small hydrogen fires at greater distances in full daylight being developed. Detectors utilize part of infrared spectrum in which signals from hydrogen flames 10 to the 3rd power to 10 to the 4th power times as intense as ultraviolet region of current detectors. Utilize low-loss infrared lenses for focusing and for limiting fields of view to screen out spurious signals from nearby sources. Working distances of as much as 100 meters possible. Portable, battery-powered unit gives audible alarm, in form of increase in frequency of tone, when aimed at hydrogen fire.
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Collins, J. David, Youngquist, Robert C., Simmons, Stephen M.. 1993-08-01. Two-Band Pyrometers Detect Hydrogen Fires. https://ntrs.nasa.gov/citations/19930000457
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